Corner stand



FIG. 1 is a top perspective view of a corner stand, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view;

FIG. 5 is a rear elevation view;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a corner stool, as shown and described. 